One vertex per element, one color per generator, with an edge from x to x·s.
(10,14)(15,18)(16,20)(22,24)(25,26)(27,34)(28,37)(29,32)(30,36)(31,33)(35,39)(38,40) involution — undirected(1,2,5,6)(3,4,7,8)(9,10,13,14)(11,15,17,18)(12,20,21,16)(19,24,23,22)(25,27)(26,30)(28,38)(29,35)(31,36)(32,40)(33,34)(37,39)(2,6)(3,7)(11,17)(15,18)(19,23)(22,24)(25,28,31,29)(26,32,33,37)(27,35,36,38)(30,39,34,40)(2,6)(3,7)(9,10)(11,18)(12,16)(13,14)(15,17)(19,24)(20,21)(22,23)(25,27)(26,30)(28,35)(29,38)(31,36)(32,39)(33,34)(37,40) involution — undirected(1,3)(2,4)(5,7)(6,8)(9,11,13,17)(10,15,14,18)(12,19,21,23)(16,22,20,24)(25,29,31,28)(26,32,33,37)(27,35,36,38)(30,40,34,39)(1,4)(2,3)(5,8)(6,7)(9,12)(10,16)(11,19)(13,21)(14,20)(15,22)(17,23)(18,24)(25,30)(26,27)(28,39)(29,40)(31,34)(32,35)(33,36)(37,38) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.